Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1972_11_2_a5, author = {A. S. Anikeev}, title = {Classification of derivable propositional formulas}, journal = {Matemati\v{c}eskie zametki}, pages = {165--174}, publisher = {mathdoc}, volume = {11}, number = {2}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1972_11_2_a5/} }
A. S. Anikeev. Classification of derivable propositional formulas. Matematičeskie zametki, Tome 11 (1972) no. 2, pp. 165-174. http://geodesic.mathdoc.fr/item/MZM_1972_11_2_a5/